Trucks already have these kind of audible warnings when vehicles or cyclists are in their blind spot. The problem in Tempe was that the car did not recognise t

Trucks already have these kind of audible warnings when vehicles or cyclists are in their blind spot. The problem in Tempe was that the car did not recognise the pedestrian, so how could it be relied upon to warn the driver? Perhaps a better option would be to buzz when the driver is not looking at the road, as was the case in the Tempe accident. This technology is already in use [0]. [0] https://en.wikipedia.org/wiki/Driver_drowsiness_detection https://en.wikipedia.org/wiki/Driver_drowsiness_detection